Your channel's off to a great start!
My only suggestion would be to speed up a little bit. That way, a viewer looking for a quick and easy model will not be intimidated by an 11 and a half minute video. You can also remove the beginning part of making the square, and just provide a link to your A4 paper to square video.
It's great that you're using your own designs, but keep in mind that you can fold simple traditional models, too
Good luck!